M&S says

Whether a black tie ball or an important meeting at the office, look your best with our slim fit suit trousers. A classic centre crease and flat front make these trousers a sharp choice for any occasion - perfect with one of our dinner jackets for extra panache, or simply a long sleeve shirt for a more relaxed appearance. These dinner trousers are machine washable and tumble dryer safe for your convenience, making them the perfect choice for effortless and elegant style.

Care and Composition

35 days to return
You may return unused products within 35 days of purchase with a valid parcel summary document. Your items don't need to be in the original box or bag as long as they're securely packaged.

How to return
Simply use our returns portal to print a returns label and returns note. You will then be able to return all or part of your order at your own cost through your preferred carrier. To create a returns label, visit our returns portal select this option and follow the instructions.